In the figure is shown a photograph of an interference pattern on a screen produ

Question

In the figure is shown a photograph of an interference pattern on a screen produced by light passing through two slits. The brightest maximum in this pattern is indicated by an arrow. Consider the dark minimum indicated by the second arrow. Let x1 be the distance from this minimum on the screen to one of the slits, and let x-z be the distance from this same minimum on the screen to the other slit. What is the value of |x2 - x1|? 0 1/2 lambda lambda 3/2 lambda 2 lambda 5/2 lambda 3 lambda Consider reflection of light from a thin film of MgF2 on a glass lens. Which reflected ray undergoes a 180 degree phase change upon reflection? A B both A and B neither A nor B In the figure is given the index of refraction n for air, MgF2, and glass. Consider diffraction of light through a narrow slit. Which color of light will spread out the most? blue red

Explanation / Answer

1. D 2. C 3. B

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